<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./Vue.js"></script>
</head>
<body>
    <div id="app">
        <div>{{mes}}</div>
        <input type="text">
        <br><button>{{msg}}</button>
        <select name="SF" id="123">
            <option>{{a}}</option>
            <option>{{b}}</option>
            <option>{{c}}</option>
            <option>{{d}}</option>
        </select>
    </div>

    <script>
        Vue.createApp({
            data() {
                return {
                    mes: "Hello World",
                    msg:"Click",
                    a:"北京",
                    b:"上海",
                    c:"广州",
                    d:"深圳"
                }
            }
        }).mount("#app")
    </script>
</body>
</html>